SEGMENTED DIGITAL-TO-TIME CONVERTER CALIBRATION

摘要

This application discusses, among other things, calibration systems for ameliorating nonlinearity of a digital-to-time converter (DTC). In an example, a calibration system can include a calibration path configured to represent a segment of the DTC, a time-to-digital circuit configured to receive an output of the calibration path and the processed frequency information and to provide timing error information of the segment, and a calibration engine configured to receive controller modulation information from a main controller, to provide calibration modulation information to the DTC, to receive the timing error information, and to provide compensation information to a correction circuit coupled to the DTC using the timing error information.

主权项

1. A calibration circuit for a segmented digital-to-time converter (DTC), the segmented DTC configured to receive reference frequency information and to provide processed frequency information, the calibration circuit comprising:
a calibration path configured to represent a segment of the segmented DTC; a time-to-digital circuit configured to receive an output of the calibration path and the processed frequency information and to provide timing error information of the segment; a calibration engine configured to receive controller modulation information from a main controller, to provide calibration modulation information to the segmented DTC, to receive the timing error information, and to provide compensation information to a correction circuit coupled to the segmented DTC using the timing error information.